fix some bugs

* add servertime on handshake
* slice del bug fixed
* bug fixed #84

cluster/cluster.go

@@ -52,9 +52,16 @@ func (c *cluster) Register(_ context.Context, req *clusterpb.RegisterRequest) (*
 	}
 
 	resp := &clusterpb.RegisterResponse{}
-	for _, m := range c.members {
+	for k, m := range c.members {
 		if m.memberInfo.ServiceAddr == req.MemberInfo.ServiceAddr {
-			return nil, fmt.Errorf("address %s has registered", req.MemberInfo.ServiceAddr)
+			// 节点异常崩溃，不会执行unregister，此时再次启动该节点，由于已存在注册信息，将再也无法成功注册，这里做个修改，先移除后重新注册
+			if k >= len(c.members)-1 {
+				c.members = c.members[:k]
+			} else {
+				c.members = append(c.members[:k], c.members[k+1:]...)
+			}
+			break
+			//return nil, fmt.Errorf("address %s has registered", req.MemberInfo.ServiceAddr)
 		}
 	}
 
@@ -126,7 +133,7 @@ func (c *cluster) Unregister(_ context.Context, req *clusterpb.UnregisterRequest
 	// Register services to current node
 	c.currentNode.handler.delMember(req.ServiceAddr)
 	c.mu.Lock()
-	if index == len(c.members)-1 {
+	if index >= len(c.members)-1 {
 		c.members = c.members[:index]
 	} else {
 		c.members = append(c.members[:index], c.members[index+1:]...)
@@ -187,7 +194,11 @@ func (c *cluster) delMember(addr string) {
 		}
 	}
 	if index != -1 {
-		c.members = append(c.members[:index], c.members[index+1:]...)
+		if index >= len(c.members)-1 {
+			c.members = c.members[:index]
+		} else {
+			c.members = append(c.members[:index], c.members[index+1:]...)
+		}
 	}
 	c.mu.Unlock()
 }

cluster/handler.go

@@ -54,10 +54,30 @@ var (
 type rpcHandler func(session *session.Session, msg *message.Message, noCopy bool)
 
 func cache() {
-	data, err := json.Marshal(map[string]interface{}{
+	hrdata := map[string]interface{}{
 		"code": 200,
-		"sys":  map[string]float64{"heartbeat": env.Heartbeat.Seconds()},
-	})
+		"sys": map[string]interface{}{
+			"heartbeat":  env.Heartbeat.Seconds(),
+			"servertime": time.Now().UTC().Unix(),
+		},
+	}
+	if dict, ok := message.GetDictionary(); ok {
+		hrdata = map[string]interface{}{
+			"code": 200,
+			"sys": map[string]interface{}{
+				"heartbeat":  env.Heartbeat.Seconds(),
+				"servertime": time.Now().UTC().Unix(),
+				"dict":       dict,
+			},
+		}
+	}
+	// data, err := json.Marshal(map[string]interface{}{
+	// 	"code": 200,
+	// 	"sys": map[string]float64{
+	// 		"heartbeat": env.Heartbeat.Seconds(),
+	// 	},
+	// })
+	data, err := json.Marshal(hrdata)
 	if err != nil {
 		panic(err)
 	}
@@ -140,7 +160,11 @@ func (h *LocalHandler) delMember(addr string) {
 	for name, members := range h.remoteServices {
 		for i, maddr := range members {
 			if addr == maddr.ServiceAddr {
-				members = append(members[:i], members[i+1:]...)
+				if i >= len(members)-1 {
+					members = members[:i]
+				} else {
+					members = append(members[:i], members[i+1:]...)
+				}
 			}
 		}
 		if len(members) == 0 {
@@ -192,7 +216,7 @@ func (h *LocalHandler) handle(conn net.Conn) {
 
 		members := h.currentNode.cluster.remoteAddrs()
 		for _, remote := range members {
-			log.Println("Notify remote server success", remote)
+			log.Println("Notify remote server", remote)
 			pool, err := h.currentNode.rpcClient.getConnPool(remote)
 			if err != nil {
 				log.Println("Cannot retrieve connection pool for address", remote, err)

internal/message/message.go

@@ -244,3 +244,10 @@ func SetDictionary(dict map[string]uint16) {
 		codes[code] = r
 	}
 }
+
+func GetDictionary() (map[string]uint16, bool) {
+	if len(routes) <= 0 {
+		return nil, false
+	}
+	return routes, true
+}